Variable-speed transmission device.



v G. J. ROBINSON.

VARIABLE SPEED TRANSIISSION DEVICE.

21.10.1110! nun 12:11.23, 1911.

1,027,767; Patented May 28,1912.

' E I Y INVENTOR! A I QMkJJMfl/Z l BY r WI TNESSES:

UNITED sT 'TEs PA ENT OFFICE.

- CHARLES J. ROBINSON, or BREMER'roiT, WASHINGTON, assrcnonor ONE-HALF'ro ERNESTE. 'CREELMAN, OE BREMERTON, WASHING-TON.

v'riiismsmsn TRANSMISSION DEVICE.-

v Specification of Letters Patent.

Patented Ma 28,1912.

Application filed February 23, 1911. Serial No. 610,357.

- following is a specification.

The object of this invention is the improvement invariable speedpower'transmission devices, whereby the speed of a driven shaft may beconveniently regulated and without sacrificing the power efiiciency. 1

The invention consists in the novel construction and combination ofparts, as will behereinafter described and claimed. r

In the accompanying drawings, Figure. 1 is a longitudinal section ofmechanism embodying my invention. .Fig. 2 is a trans- I versesectionthrougli 2-2 of Fig. 1. Fig.

3 is a perspective view of one of the obturating blades such as'shown inthe precedlng views; and Fig; 4 is a similar view of a .controllin arbortherefor.

' The re erence numeral 5 designates adriving shaft and 6 a driven shaftwhich are dis'posedin axial alinement. Keyed or otherwise secured tosaid driving shaft is a spur pinion 7 and a. cylindrical element, orwheel, 8 respectively disposed in chambers 9 and 10 of said casing;

Fixedly secured, as by a I drivenshaft'is the hub 12--of a casing-.13,

and at the opposite end of the casing is provided a tubular boss- 14:.The driving shaft5 extends through said boss and "desirably into thebore 0 the hub 12. 1

Located upon diametrically opposite sides of the axis of the shaft 5 andcentrally of the casing chambers -15 and 15' are arbors 16 which carrycylindrical rotary elements 17 and 17 The chambers 10, 15 and 15'rareofequal lengths and the diameter of the first named.

one is equal to the diameter of the con tained element 8. The radii ofthe other eleinents 17. and 17 are such that the periph eries' of theelements will contact with the periphery of the element 8. l'lhediameters of the chambers 15 and 15' are, however, of

greater diameters than'the" contained elements, consequently, there isafiordedabout each of the latter an annular. space into which theelement 8 protrudes.

key" 11, to the Splined to'arbors 1 6 and '16 are gearf wheels 18 and 18in mesh with the teeth of the aforesa d pinion. Said arbors arejournaled in bearings provided in the casing and extend outside of thecasing, as shown in Fig. 1.' I

The boss 14 serves as a bearing for a sleeve 19 having a circumferentialgroove 20 into which project. studs 21 provided in the forked end ofa-lever22 which is employed for giving 'endwise motion to said 23 arearms extending from the sleeve carrying ins 24 which project into holes25 bored into the respective arbors and are secured against withdrawalby pins 26 extending'through the arbors and into annular grooves of thepins 24. The elements 17 and 17 are each provided with a slot 28 whichare, in the radial planes with slots 29 of thearbors. Seated in theslots are blades 30 and'30 provided with transverse wings 31 which fitinto inclined guidew'ays- -32 29, whereby said blades are caused bylongitudinal'movements of the arbor to be thrust radially in or out ofthe annular spaces about the respective elements; The element 8. isformed with-anotch- 33 in its periphery to accommodate alternately theblades 30 -and30 when thelatter are protruded outside of thecircumferences-of the elements 17 and 17 i The-spaces unoccupied by theelements 17 and 17 within the chambers 15 and 15 are filled with oil orother suitable rotary motion to the element 8 and the toothed pinion 7positively drives the arbors wand 16 through the agency! of said pi1r-''io n'and the gear wheels 18 and 18. The

provided in the side walls of the arbor slots elements 17 and 17 securedfor rotation to the arbors are thus driven simultaneously with, but inopposite directions from, the

element 8.- When the blades 30 and 30' are retracted to be within thecircumference of 22).- the' elements 17 and '17.. .turn within theirchambers with an inappreciable resistancewith respect to the oil. Whenthese elements are thus rendered free to turn there 1s 'no operativeconnection between the drrv-I.

ing shaft 5 and driven shaft 6, and the driven shaft is idle. When theblades 30 and 30 are protruded outside of the circumferenccs of theelements 17 and 17, the liquid in advance of the blades, or between thelatterand the part of the element 8 which extends intothe respectivechambers 15 and 15, will resist the turning of the elements 17 and 17'proportionately to the amount of the protrusion of the blades. With theblades protruded to contact with the peripheral walls of the chambers 15and .15, the oil, subject to any leakage about the blades or between theelements, will arrest the turning of the blades about their arbor axeswith the result that the casing 13 will be rotated to drive the drivenshaft 6 at substantially the speed of the driving shaft. Less speeds forthe shaft 6 being obtained by regulating the exposure of the blades tothe required amount.

The invention is simple in construction and well adapted for thepurposes of the invention.

Various changes may obviously be made from the aforedescribed embodimentof the invention without departing from the spirit of the invention. Forexample, the casing may be made in the shape of a pulley or wheel whencethe power may be utilized by selected power drives, such as a belt.gearing, etc., and with the elimination of a driven-shaft, asillustrated. Furthermore, instead of em loying a pair of elements 17 and17 and t e associated parts therewith, one or more such groups ofelements may be employed.

What I claim, is

1. In a variable speed transmission device, the combination with adriving shaft, and a series of toothed gears driven from said shaft, ofa series of elements rotated by said shaft and said gears, a casingprovided with chambers for the res ective elements, and means carried byand adjustable radially in one of said elements to coact with a liquidprovided in the chamber of such element for causing the casing to berotated by the shaft.

2. In a variable speed transmission device,

' Witnesses a shaft, a casing, an element driven by said shaft androtatable in a chamber provided in said casing, a second elementrotatable in a second chamber of the casing, power driven means operatedby said shaft tending to rotate said second element, and adjustablemeans carried by the second named element which is arran ed to beinfluenced by a liquid contained in said second chamber whereby thecasing is yieldingly coupled to the shaft.

3. In a variable speed transmission device, the combination with a powershaft, :1 toothed pinion, and an element having a gap in its peripherysecured to the shaft, of a gear wheel in mesh with said pinion, a secondelement rotatable with said gear wheel, a blade carried by the secondnamed element, means for adjusting the position of said blade radiallyof the element, a

casing for said elements and provided with a chamber in which the firstnamed element is fitted and also provided with another chamber ofgreater diameter than that of the second named element to afford spaceabout the latter to accommodate a supply of lh llid.

4. A variable speed transmission device, comprising a driving shaft, :1toothed pinion mounted on said shaft, a cylindrical element mounted uponthe shaft and provided with a gap in its periphery, a gear wheel in meshwith the pinion, an arbor carrying said wheel, a second element mountedon the arbor, a blade carried in said second element, a casing providedwith chambers for the respective elements, the chamber for the secondnamed element being of greater diameter than the diameter of theelement, and means operating through the medium of the arbor whereby theblade is adjustable radially to and from the peripheral wall of thechamber-of the second named element for the purpose described. I

In testimony whereof I have atlixed my signature in presence of twowitnesses.

CHARLES J ROBINSON.

H. BARNES, E. PETERSON.

